Best answer by Mohammed
It's not possible to directly reduce your minutes to increase other parts of your plan, however, you should be able to log-into your iD app/account and look at the available options for tariff changes.
We're fairly flexible when it comes to SIM-only plans so you can change plans every 30-days.
If you're on a handset contract, you may not see any plan change options available, in which case, please email us on email@example.com
We'll be able to assist further.